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손현기,카오 후안 빈,조용권,신동식,최지연,Sohn, Hyonkee,Cao, Binh Xuan,Cho, Yong-Kwon,Shin, Dong-Sig,Choi, Jiyeon 한국레이저가공학회 2014 한국레이저가공학회지 Vol.17 No.4
In printed electronics, printing rolls are used to transfer electronic ink onto a flexible substrate. Generally printing rolls are patterned in microscale by the indirect laser method. Since based on the wet etch process, the indirect method is neither environment-friendly nor suitable for making a printing roll with patterns narrower than $20{\mu}m$. In this paper, we have directly engraved micro-patterns into a Zn-coated metal specimens using a picosecond laser in order both to engrave $10{\mu}m$-wide patterns and to improve the pattern profile. Experiments showed that it is possible to engrave $10{\mu}m$-wide patterns with an a rectangular-shaped profile which is necessary for the dimensionally accurate printing.